net/bridge/br_netlink.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *      Bridge netlink control interface
   4  *
   5  *      Authors:
   6  *      Stephen Hemminger               <shemminger@osdl.org>
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/slab.h>
  11 #include <linux/etherdevice.h>
  12 #include <net/rtnetlink.h>
  13 #include <net/net_namespace.h>
  14 #include <net/sock.h>
  15 #include <uapi/linux/if_bridge.h>
  16
  17 #include "br_private.h"
  18 #include "br_private_stp.h"
  19 #include "br_private_cfm.h"
  20 #include "br_private_tunnel.h"
  21 #include "br_private_mcast_eht.h"
  22
  23 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  24                                 u32 filter_mask)
  25 {
  26         struct net_bridge_vlan *v;
  27         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
  28         u16 flags, pvid;
  29         int num_vlans = 0;
  30
  31         if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
  32                 return 0;
  33
  34         pvid = br_get_pvid(vg);
  35         /* Count number of vlan infos */
  36         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
  37                 flags = 0;
  38                 /* only a context, bridge vlan not activated */
  39                 if (!br_vlan_should_use(v))
  40                         continue;
  41                 if (v->vid == pvid)
  42                         flags |= BRIDGE_VLAN_INFO_PVID;
  43
  44                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
  45                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
  46
  47                 if (vid_range_start == 0) {
  48                         goto initvars;
  49                 } else if ((v->vid - vid_range_end) == 1 &&
  50                         flags == vid_range_flags) {
  51                         vid_range_end = v->vid;
  52                         continue;
  53                 } else {
  54                         if ((vid_range_end - vid_range_start) > 0)
  55                                 num_vlans += 2;
  56                         else
  57                                 num_vlans += 1;
  58                 }
  59 initvars:
  60                 vid_range_start = v->vid;
  61                 vid_range_end = v->vid;
  62                 vid_range_flags = flags;
  63         }
  64
  65         if (vid_range_start != 0) {
  66                 if ((vid_range_end - vid_range_start) > 0)
  67                         num_vlans += 2;
  68                 else
  69                         num_vlans += 1;
  70         }
  71
  72         return num_vlans;
  73 }
  74
  75 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  76                                  u32 filter_mask)
  77 {
  78         int num_vlans;
  79
  80         if (!vg)
  81                 return 0;
  82
  83         if (filter_mask & RTEXT_FILTER_BRVLAN)
  84                 return vg->num_vlans;
  85
  86         rcu_read_lock();
  87         num_vlans = __get_num_vlan_infos(vg, filter_mask);
  88         rcu_read_unlock();
  89
  90         return num_vlans;
  91 }
  92
  93 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
  94                                            u32 filter_mask)
  95 {
  96         struct net_bridge_vlan_group *vg = NULL;
  97         struct net_bridge_port *p = NULL;
  98         struct net_bridge *br = NULL;
  99         u32 num_cfm_peer_mep_infos;
 100         u32 num_cfm_mep_infos;
 101         size_t vinfo_sz = 0;
 102         int num_vlan_infos;
 103
 104         rcu_read_lock();
 105         if (netif_is_bridge_port(dev)) {
 106                 p = br_port_get_rcu(dev);
 107                 vg = nbp_vlan_group_rcu(p);
 108         } else if (dev->priv_flags & IFF_EBRIDGE) {
 109                 br = netdev_priv(dev);
 110                 vg = br_vlan_group_rcu(br);
 111         }
 112         num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
 113         rcu_read_unlock();
 114
 115         if (p && (p->flags & BR_VLAN_TUNNEL))
 116                 vinfo_sz += br_get_vlan_tunnel_info_size(vg);
 117
 118         /* Each VLAN is returned in bridge_vlan_info along with flags */
 119         vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
 120
 121         if (!(filter_mask & RTEXT_FILTER_CFM_STATUS))
 122                 return vinfo_sz;
 123
 124         if (!br)
 125                 return vinfo_sz;
 126
 127         /* CFM status info must be added */
 128         br_cfm_mep_count(br, &num_cfm_mep_infos);
 129         br_cfm_peer_mep_count(br, &num_cfm_peer_mep_infos);
 130
 131         vinfo_sz += nla_total_size(0);  /* IFLA_BRIDGE_CFM */
 132         /* For each status struct the MEP instance (u32) is added */
 133         /* MEP instance (u32) + br_cfm_mep_status */
 134         vinfo_sz += num_cfm_mep_infos *
 135                      /*IFLA_BRIDGE_CFM_MEP_STATUS_INSTANCE */
 136                     (nla_total_size(sizeof(u32))
 137                      /* IFLA_BRIDGE_CFM_MEP_STATUS_OPCODE_UNEXP_SEEN */
 138                      + nla_total_size(sizeof(u32))
 139                      /* IFLA_BRIDGE_CFM_MEP_STATUS_VERSION_UNEXP_SEEN */
 140                      + nla_total_size(sizeof(u32))
 141                      /* IFLA_BRIDGE_CFM_MEP_STATUS_RX_LEVEL_LOW_SEEN */
 142                      + nla_total_size(sizeof(u32)));
 143         /* MEP instance (u32) + br_cfm_cc_peer_status */
 144         vinfo_sz += num_cfm_peer_mep_infos *
 145                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_INSTANCE */
 146                     (nla_total_size(sizeof(u32))
 147                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_PEER_MEPID */
 148                      + nla_total_size(sizeof(u32))
 149                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_CCM_DEFECT */
 150                      + nla_total_size(sizeof(u32))
 151                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_RDI */
 152                      + nla_total_size(sizeof(u32))
 153                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_PORT_TLV_VALUE */
 154                      + nla_total_size(sizeof(u8))
 155                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_IF_TLV_VALUE */
 156                      + nla_total_size(sizeof(u8))
 157                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEEN */
 158                      + nla_total_size(sizeof(u32))
 159                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_TLV_SEEN */
 160                      + nla_total_size(sizeof(u32))
 161                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEQ_UNEXP_SEEN */
 162                      + nla_total_size(sizeof(u32)));
 163
 164         return vinfo_sz;
 165 }
 166
 167 static inline size_t br_port_info_size(void)
 168 {
 169         return nla_total_size(1)        /* IFLA_BRPORT_STATE  */
 170                 + nla_total_size(2)     /* IFLA_BRPORT_PRIORITY */
 171                 + nla_total_size(4)     /* IFLA_BRPORT_COST */
 172                 + nla_total_size(1)     /* IFLA_BRPORT_MODE */
 173                 + nla_total_size(1)     /* IFLA_BRPORT_GUARD */
 174                 + nla_total_size(1)     /* IFLA_BRPORT_PROTECT */
 175                 + nla_total_size(1)     /* IFLA_BRPORT_FAST_LEAVE */
 176                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_TO_UCAST */
 177                 + nla_total_size(1)     /* IFLA_BRPORT_LEARNING */
 178                 + nla_total_size(1)     /* IFLA_BRPORT_UNICAST_FLOOD */
 179                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_FLOOD */
 180                 + nla_total_size(1)     /* IFLA_BRPORT_BCAST_FLOOD */
 181                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP */
 182                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP_WIFI */
 183                 + nla_total_size(1)     /* IFLA_BRPORT_VLAN_TUNNEL */
 184                 + nla_total_size(1)     /* IFLA_BRPORT_NEIGH_SUPPRESS */
 185                 + nla_total_size(1)     /* IFLA_BRPORT_ISOLATED */
 186                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
 187                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
 188                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_PORT */
 189                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_COST */
 190                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_ID */
 191                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_NO */
 192                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
 193                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_CONFIG_PENDING */
 194                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
 195                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
 196                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
 197 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 198                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MULTICAST_ROUTER */
 199 #endif
 200                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_GROUP_FWD_MASK */
 201                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MRP_RING_OPEN */
 202                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MRP_IN_OPEN */
 203                 + nla_total_size(sizeof(u32))   /* IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT */
 204                 + nla_total_size(sizeof(u32))   /* IFLA_BRPORT_MCAST_EHT_HOSTS_CNT */
 205                 + 0;
 206 }
 207
 208 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
 209 {
 210         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
 211                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
 212                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
 213                 + nla_total_size(4) /* IFLA_MASTER */
 214                 + nla_total_size(4) /* IFLA_MTU */
 215                 + nla_total_size(4) /* IFLA_LINK */
 216                 + nla_total_size(1) /* IFLA_OPERSTATE */
 217                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
 218                 + nla_total_size(br_get_link_af_size_filtered(dev,
 219                                  filter_mask)) /* IFLA_AF_SPEC */
 220                 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */
 221 }
 222
 223 static int br_port_fill_attrs(struct sk_buff *skb,
 224                               const struct net_bridge_port *p)
 225 {
 226         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
 227         struct net_bridge_port *backup_p;
 228         u64 timerval;
 229
 230         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
 231             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
 232             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
 233             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
 234             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
 235             nla_put_u8(skb, IFLA_BRPORT_PROTECT,
 236                        !!(p->flags & BR_ROOT_BLOCK)) ||
 237             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
 238                        !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
 239             nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
 240                        !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
 241             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
 242             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
 243                        !!(p->flags & BR_FLOOD)) ||
 244             nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
 245                        !!(p->flags & BR_MCAST_FLOOD)) ||
 246             nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
 247                        !!(p->flags & BR_BCAST_FLOOD)) ||
 248             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
 249             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
 250                        !!(p->flags & BR_PROXYARP_WIFI)) ||
 251             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
 252                     &p->designated_root) ||
 253             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
 254                     &p->designated_bridge) ||
 255             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
 256             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
 257             nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
 258             nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
 259             nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
 260                        p->topology_change_ack) ||
 261             nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
 262             nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
 263                                                         BR_VLAN_TUNNEL)) ||
 264             nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
 265             nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
 266                        !!(p->flags & BR_NEIGH_SUPPRESS)) ||
 267             nla_put_u8(skb, IFLA_BRPORT_MRP_RING_OPEN, !!(p->flags &
 268                                                           BR_MRP_LOST_CONT)) ||
 269             nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN,
 270                        !!(p->flags & BR_MRP_LOST_IN_CONT)) ||
 271             nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)))
 272                 return -EMSGSIZE;
 273
 274         timerval = br_timer_value(&p->message_age_timer);
 275         if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
 276                               IFLA_BRPORT_PAD))
 277                 return -EMSGSIZE;
 278         timerval = br_timer_value(&p->forward_delay_timer);
 279         if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
 280                               IFLA_BRPORT_PAD))
 281                 return -EMSGSIZE;
 282         timerval = br_timer_value(&p->hold_timer);
 283         if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
 284                               IFLA_BRPORT_PAD))
 285                 return -EMSGSIZE;
 286
 287 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 288         if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
 289                        p->multicast_router) ||
 290             nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT,
 291                         p->multicast_eht_hosts_limit) ||
 292             nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_CNT,
 293                         p->multicast_eht_hosts_cnt))
 294                 return -EMSGSIZE;
 295 #endif
 296
 297         /* we might be called only with br->lock */
 298         rcu_read_lock();
 299         backup_p = rcu_dereference(p->backup_port);
 300         if (backup_p)
 301                 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT,
 302                             backup_p->dev->ifindex);
 303         rcu_read_unlock();
 304
 305         return 0;
 306 }
 307
 308 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 309                                     u16 vid_end, u16 flags)
 310 {
 311         struct  bridge_vlan_info vinfo;
 312
 313         if ((vid_end - vid_start) > 0) {
 314                 /* add range to skb */
 315                 vinfo.vid = vid_start;
 316                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 317                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 318                             sizeof(vinfo), &vinfo))
 319                         goto nla_put_failure;
 320
 321                 vinfo.vid = vid_end;
 322                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 323                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 324                             sizeof(vinfo), &vinfo))
 325                         goto nla_put_failure;
 326         } else {
 327                 vinfo.vid = vid_start;
 328                 vinfo.flags = flags;
 329                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 330                             sizeof(vinfo), &vinfo))
 331                         goto nla_put_failure;
 332         }
 333
 334         return 0;
 335
 336 nla_put_failure:
 337         return -EMSGSIZE;
 338 }
 339
 340 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 341                                          struct net_bridge_vlan_group *vg)
 342 {
 343         struct net_bridge_vlan *v;
 344         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 345         u16 flags, pvid;
 346         int err = 0;
 347
 348         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 349          * and mark vlan info with begin and end flags
 350          * if vlaninfo represents a range
 351          */
 352         pvid = br_get_pvid(vg);
 353         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 354                 flags = 0;
 355                 if (!br_vlan_should_use(v))
 356                         continue;
 357                 if (v->vid == pvid)
 358                         flags |= BRIDGE_VLAN_INFO_PVID;
 359
 360                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 361                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 362
 363                 if (vid_range_start == 0) {
 364                         goto initvars;
 365                 } else if ((v->vid - vid_range_end) == 1 &&
 366                         flags == vid_range_flags) {
 367                         vid_range_end = v->vid;
 368                         continue;
 369                 } else {
 370                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 371                                                        vid_range_end,
 372                                                        vid_range_flags);
 373                         if (err)
 374                                 return err;
 375                 }
 376
 377 initvars:
 378                 vid_range_start = v->vid;
 379                 vid_range_end = v->vid;
 380                 vid_range_flags = flags;
 381         }
 382
 383         if (vid_range_start != 0) {
 384                 /* Call it once more to send any left over vlans */
 385                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 386                                                vid_range_end,
 387                                                vid_range_flags);
 388                 if (err)
 389                         return err;
 390         }
 391
 392         return 0;
 393 }
 394
 395 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 396                               struct net_bridge_vlan_group *vg)
 397 {
 398         struct bridge_vlan_info vinfo;
 399         struct net_bridge_vlan *v;
 400         u16 pvid;
 401
 402         pvid = br_get_pvid(vg);
 403         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 404                 if (!br_vlan_should_use(v))
 405                         continue;
 406
 407                 vinfo.vid = v->vid;
 408                 vinfo.flags = 0;
 409                 if (v->vid == pvid)
 410                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 411
 412                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 413                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 414
 415                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 416                             sizeof(vinfo), &vinfo))
 417                         goto nla_put_failure;
 418         }
 419
 420         return 0;
 421
 422 nla_put_failure:
 423         return -EMSGSIZE;
 424 }
 425
 426 /*
 427  * Create one netlink message for one interface
 428  * Contains port and master info as well as carrier and bridge state.
 429  */
 430 static int br_fill_ifinfo(struct sk_buff *skb,
 431                           const struct net_bridge_port *port,
 432                           u32 pid, u32 seq, int event, unsigned int flags,
 433                           u32 filter_mask, const struct net_device *dev,
 434                           bool getlink)
 435 {
 436         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 437         struct nlattr *af = NULL;
 438         struct net_bridge *br;
 439         struct ifinfomsg *hdr;
 440         struct nlmsghdr *nlh;
 441
 442         if (port)
 443                 br = port->br;
 444         else
 445                 br = netdev_priv(dev);
 446
 447         br_debug(br, "br_fill_info event %d port %s master %s\n",
 448                      event, dev->name, br->dev->name);
 449
 450         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 451         if (nlh == NULL)
 452                 return -EMSGSIZE;
 453
 454         hdr = nlmsg_data(nlh);
 455         hdr->ifi_family = AF_BRIDGE;
 456         hdr->__ifi_pad = 0;
 457         hdr->ifi_type = dev->type;
 458         hdr->ifi_index = dev->ifindex;
 459         hdr->ifi_flags = dev_get_flags(dev);
 460         hdr->ifi_change = 0;
 461
 462         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 463             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 464             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 465             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 466             (dev->addr_len &&
 467              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 468             (dev->ifindex != dev_get_iflink(dev) &&
 469              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 470                 goto nla_put_failure;
 471
 472         if (event == RTM_NEWLINK && port) {
 473                 struct nlattr *nest;
 474
 475                 nest = nla_nest_start(skb, IFLA_PROTINFO);
 476                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 477                         goto nla_put_failure;
 478                 nla_nest_end(skb, nest);
 479         }
 480
 481         if (filter_mask & (RTEXT_FILTER_BRVLAN |
 482                            RTEXT_FILTER_BRVLAN_COMPRESSED |
 483                            RTEXT_FILTER_MRP |
 484                            RTEXT_FILTER_CFM_CONFIG |
 485                            RTEXT_FILTER_CFM_STATUS)) {
 486                 af = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
 487                 if (!af)
 488                         goto nla_put_failure;
 489         }
 490
 491         /* Check if  the VID information is requested */
 492         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 493             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 494                 struct net_bridge_vlan_group *vg;
 495                 int err;
 496
 497                 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
 498                 rcu_read_lock();
 499                 if (port)
 500                         vg = nbp_vlan_group_rcu(port);
 501                 else
 502                         vg = br_vlan_group_rcu(br);
 503
 504                 if (!vg || !vg->num_vlans) {
 505                         rcu_read_unlock();
 506                         goto done;
 507                 }
 508                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 509                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 510                 else
 511                         err = br_fill_ifvlaninfo(skb, vg);
 512
 513                 if (port && (port->flags & BR_VLAN_TUNNEL))
 514                         err = br_fill_vlan_tunnel_info(skb, vg);
 515                 rcu_read_unlock();
 516                 if (err)
 517                         goto nla_put_failure;
 518         }
 519
 520         if (filter_mask & RTEXT_FILTER_MRP) {
 521                 int err;
 522
 523                 if (!br_mrp_enabled(br) || port)
 524                         goto done;
 525
 526                 rcu_read_lock();
 527                 err = br_mrp_fill_info(skb, br);
 528                 rcu_read_unlock();
 529
 530                 if (err)
 531                         goto nla_put_failure;
 532         }
 533
 534         if (filter_mask & (RTEXT_FILTER_CFM_CONFIG | RTEXT_FILTER_CFM_STATUS)) {
 535                 struct nlattr *cfm_nest = NULL;
 536                 int err;
 537
 538                 if (!br_cfm_created(br) || port)
 539                         goto done;
 540
 541                 cfm_nest = nla_nest_start(skb, IFLA_BRIDGE_CFM);
 542                 if (!cfm_nest)
 543                         goto nla_put_failure;
 544
 545                 if (filter_mask & RTEXT_FILTER_CFM_CONFIG) {
 546                         rcu_read_lock();
 547                         err = br_cfm_config_fill_info(skb, br);
 548                         rcu_read_unlock();
 549                         if (err)
 550                                 goto nla_put_failure;
 551                 }
 552
 553                 if (filter_mask & RTEXT_FILTER_CFM_STATUS) {
 554                         rcu_read_lock();
 555                         err = br_cfm_status_fill_info(skb, br, getlink);
 556                         rcu_read_unlock();
 557                         if (err)
 558                                 goto nla_put_failure;
 559                 }
 560
 561                 nla_nest_end(skb, cfm_nest);
 562         }
 563
 564 done:
 565         if (af)
 566                 nla_nest_end(skb, af);
 567         nlmsg_end(skb, nlh);
 568         return 0;
 569
 570 nla_put_failure:
 571         nlmsg_cancel(skb, nlh);
 572         return -EMSGSIZE;
 573 }
 574
 575 void br_info_notify(int event, const struct net_bridge *br,
 576                     const struct net_bridge_port *port, u32 filter)
 577 {
 578         struct net_device *dev;
 579         struct sk_buff *skb;
 580         int err = -ENOBUFS;
 581         struct net *net;
 582         u16 port_no = 0;
 583
 584         if (WARN_ON(!port && !br))
 585                 return;
 586
 587         if (port) {
 588                 dev = port->dev;
 589                 br = port->br;
 590                 port_no = port->port_no;
 591         } else {
 592                 dev = br->dev;
 593         }
 594
 595         net = dev_net(dev);
 596         br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
 597
 598         skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
 599         if (skb == NULL)
 600                 goto errout;
 601
 602         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev, false);
 603         if (err < 0) {
 604                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 605                 WARN_ON(err == -EMSGSIZE);
 606                 kfree_skb(skb);
 607                 goto errout;
 608         }
 609         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 610         return;
 611 errout:
 612         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 613 }
 614
 615 /* Notify listeners of a change in bridge or port information */
 616 void br_ifinfo_notify(int event, const struct net_bridge *br,
 617                       const struct net_bridge_port *port)
 618 {
 619         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 620
 621         return br_info_notify(event, br, port, filter);
 622 }
 623
 624 /*
 625  * Dump information about all ports, in response to GETLINK
 626  */
 627 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 628                struct net_device *dev, u32 filter_mask, int nlflags)
 629 {
 630         struct net_bridge_port *port = br_port_get_rtnl(dev);
 631
 632         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 633             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) &&
 634             !(filter_mask & RTEXT_FILTER_MRP) &&
 635             !(filter_mask & RTEXT_FILTER_CFM_CONFIG) &&
 636             !(filter_mask & RTEXT_FILTER_CFM_STATUS))
 637                 return 0;
 638
 639         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 640                               filter_mask, dev, true);
 641 }
 642
 643 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 644                         int cmd, struct bridge_vlan_info *vinfo, bool *changed,
 645                         struct netlink_ext_ack *extack)
 646 {
 647         bool curr_change;
 648         int err = 0;
 649
 650         switch (cmd) {
 651         case RTM_SETLINK:
 652                 if (p) {
 653                         /* if the MASTER flag is set this will act on the global
 654                          * per-VLAN entry as well
 655                          */
 656                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
 657                                            &curr_change, extack);
 658                 } else {
 659                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 660                         err = br_vlan_add(br, vinfo->vid, vinfo->flags,
 661                                           &curr_change, extack);
 662                 }
 663                 if (curr_change)
 664                         *changed = true;
 665                 break;
 666
 667         case RTM_DELLINK:
 668                 if (p) {
 669                         if (!nbp_vlan_delete(p, vinfo->vid))
 670                                 *changed = true;
 671
 672                         if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
 673                             !br_vlan_delete(p->br, vinfo->vid))
 674                                 *changed = true;
 675                 } else if (!br_vlan_delete(br, vinfo->vid)) {
 676                         *changed = true;
 677                 }
 678                 break;
 679         }
 680
 681         return err;
 682 }
 683
 684 int br_process_vlan_info(struct net_bridge *br,
 685                          struct net_bridge_port *p, int cmd,
 686                          struct bridge_vlan_info *vinfo_curr,
 687                          struct bridge_vlan_info **vinfo_last,
 688                          bool *changed,
 689                          struct netlink_ext_ack *extack)
 690 {
 691         int err, rtm_cmd;
 692
 693         if (!br_vlan_valid_id(vinfo_curr->vid, extack))
 694                 return -EINVAL;
 695
 696         /* needed for vlan-only NEWVLAN/DELVLAN notifications */
 697         rtm_cmd = br_afspec_cmd_to_rtm(cmd);
 698
 699         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 700                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 701                         return -EINVAL;
 702                 *vinfo_last = vinfo_curr;
 703                 return 0;
 704         }
 705
 706         if (*vinfo_last) {
 707                 struct bridge_vlan_info tmp_vinfo;
 708                 int v, v_change_start = 0;
 709
 710                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 711                         return -EINVAL;
 712
 713                 memcpy(&tmp_vinfo, *vinfo_last,
 714                        sizeof(struct bridge_vlan_info));
 715                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
 716                         bool curr_change = false;
 717
 718                         tmp_vinfo.vid = v;
 719                         err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change,
 720                                            extack);
 721                         if (err)
 722                                 break;
 723                         if (curr_change) {
 724                                 *changed = curr_change;
 725                                 if (!v_change_start)
 726                                         v_change_start = v;
 727                         } else {
 728                                 /* nothing to notify yet */
 729                                 if (!v_change_start)
 730                                         continue;
 731                                 br_vlan_notify(br, p, v_change_start,
 732                                                v - 1, rtm_cmd);
 733                                 v_change_start = 0;
 734                         }
 735                         cond_resched();
 736                 }
 737                 /* v_change_start is set only if the last/whole range changed */
 738                 if (v_change_start)
 739                         br_vlan_notify(br, p, v_change_start,
 740                                        v - 1, rtm_cmd);
 741
 742                 *vinfo_last = NULL;
 743
 744                 return err;
 745         }
 746
 747         err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
 748         if (*changed)
 749                 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd);
 750
 751         return err;
 752 }
 753
 754 static int br_afspec(struct net_bridge *br,
 755                      struct net_bridge_port *p,
 756                      struct nlattr *af_spec,
 757                      int cmd, bool *changed,
 758                      struct netlink_ext_ack *extack)
 759 {
 760         struct bridge_vlan_info *vinfo_curr = NULL;
 761         struct bridge_vlan_info *vinfo_last = NULL;
 762         struct nlattr *attr;
 763         struct vtunnel_info tinfo_last = {};
 764         struct vtunnel_info tinfo_curr = {};
 765         int err = 0, rem;
 766
 767         nla_for_each_nested(attr, af_spec, rem) {
 768                 err = 0;
 769                 switch (nla_type(attr)) {
 770                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
 771                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
 772                                 return -EINVAL;
 773                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
 774                         if (err)
 775                                 return err;
 776                         err = br_process_vlan_tunnel_info(br, p, cmd,
 777                                                           &tinfo_curr,
 778                                                           &tinfo_last,
 779                                                           changed);
 780                         if (err)
 781                                 return err;
 782                         break;
 783                 case IFLA_BRIDGE_VLAN_INFO:
 784                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 785                                 return -EINVAL;
 786                         vinfo_curr = nla_data(attr);
 787                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
 788                                                    &vinfo_last, changed,
 789                                                    extack);
 790                         if (err)
 791                                 return err;
 792                         break;
 793                 case IFLA_BRIDGE_MRP:
 794                         err = br_mrp_parse(br, p, attr, cmd, extack);
 795                         if (err)
 796                                 return err;
 797                         break;
 798                 case IFLA_BRIDGE_CFM:
 799                         err = br_cfm_parse(br, p, attr, cmd, extack);
 800                         if (err)
 801                                 return err;
 802                         break;
 803                 }
 804         }
 805
 806         return err;
 807 }
 808
 809 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 810         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 811         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 812         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 813         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 814         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 815         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 816         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 817         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 818         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 819         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 820         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 821         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 822         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
 823         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
 824         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
 825         [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
 826         [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
 827         [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
 828         [IFLA_BRPORT_ISOLATED]  = { .type = NLA_U8 },
 829         [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
 830         [IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT] = { .type = NLA_U32 },
 831 };
 832
 833 /* Change the state of the port and notify spanning tree */
 834 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 835 {
 836         if (state > BR_STATE_BLOCKING)
 837                 return -EINVAL;
 838
 839         /* if kernel STP is running, don't allow changes */
 840         if (p->br->stp_enabled == BR_KERNEL_STP)
 841                 return -EBUSY;
 842
 843         /* if device is not up, change is not allowed
 844          * if link is not present, only allowable state is disabled
 845          */
 846         if (!netif_running(p->dev) ||
 847             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 848                 return -ENETDOWN;
 849
 850         br_set_state(p, state);
 851         br_port_state_selection(p->br);
 852         return 0;
 853 }
 854
 855 /* Set/clear or port flags based on attribute */
 856 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 857                              int attrtype, unsigned long mask)
 858 {
 859         if (!tb[attrtype])
 860                 return;
 861
 862         if (nla_get_u8(tb[attrtype]))
 863                 p->flags |= mask;
 864         else
 865                 p->flags &= ~mask;
 866 }
 867
 868 /* Process bridge protocol info on port */
 869 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[],
 870                       struct netlink_ext_ack *extack)
 871 {
 872         unsigned long old_flags, changed_mask;
 873         bool br_vlan_tunnel_old;
 874         int err;
 875
 876         old_flags = p->flags;
 877         br_vlan_tunnel_old = (old_flags & BR_VLAN_TUNNEL) ? true : false;
 878
 879         br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 880         br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 881         br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE,
 882                          BR_MULTICAST_FAST_LEAVE);
 883         br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 884         br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 885         br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 886         br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
 887         br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST,
 888                          BR_MULTICAST_TO_UNICAST);
 889         br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
 890         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 891         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 892         br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 893         br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, BR_NEIGH_SUPPRESS);
 894         br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
 895
 896         changed_mask = old_flags ^ p->flags;
 897
 898         err = br_switchdev_set_port_flag(p, p->flags, changed_mask, extack);
 899         if (err) {
 900                 p->flags = old_flags;
 901                 return err;
 902         }
 903
 904         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
 905                 nbp_vlan_tunnel_info_flush(p);
 906
 907         br_port_flags_change(p, changed_mask);
 908
 909         if (tb[IFLA_BRPORT_COST]) {
 910                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 911                 if (err)
 912                         return err;
 913         }
 914
 915         if (tb[IFLA_BRPORT_PRIORITY]) {
 916                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 917                 if (err)
 918                         return err;
 919         }
 920
 921         if (tb[IFLA_BRPORT_STATE]) {
 922                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 923                 if (err)
 924                         return err;
 925         }
 926
 927         if (tb[IFLA_BRPORT_FLUSH])
 928                 br_fdb_delete_by_port(p->br, p, 0, 0);
 929
 930 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 931         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 932                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 933
 934                 err = br_multicast_set_port_router(p, mcast_router);
 935                 if (err)
 936                         return err;
 937         }
 938
 939         if (tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]) {
 940                 u32 hlimit;
 941
 942                 hlimit = nla_get_u32(tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]);
 943                 err = br_multicast_eht_set_hosts_limit(p, hlimit);
 944                 if (err)
 945                         return err;
 946         }
 947 #endif
 948
 949         if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
 950                 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
 951
 952                 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
 953                         return -EINVAL;
 954                 p->group_fwd_mask = fwd_mask;
 955         }
 956
 957         if (tb[IFLA_BRPORT_BACKUP_PORT]) {
 958                 struct net_device *backup_dev = NULL;
 959                 u32 backup_ifindex;
 960
 961                 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
 962                 if (backup_ifindex) {
 963                         backup_dev = __dev_get_by_index(dev_net(p->dev),
 964                                                         backup_ifindex);
 965                         if (!backup_dev)
 966                                 return -ENOENT;
 967                 }
 968
 969                 err = nbp_backup_change(p, backup_dev);
 970                 if (err)
 971                         return err;
 972         }
 973
 974         return 0;
 975 }
 976
 977 /* Change state and parameters on port. */
 978 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
 979                struct netlink_ext_ack *extack)
 980 {
 981         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
 982         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 983         struct net_bridge_port *p;
 984         struct nlattr *protinfo;
 985         struct nlattr *afspec;
 986         bool changed = false;
 987         int err = 0;
 988
 989         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 990         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 991         if (!protinfo && !afspec)
 992                 return 0;
 993
 994         p = br_port_get_rtnl(dev);
 995         /* We want to accept dev as bridge itself if the AF_SPEC
 996          * is set to see if someone is setting vlan info on the bridge
 997          */
 998         if (!p && !afspec)
 999                 return -EINVAL;
1000
1001         if (p && protinfo) {
1002                 if (protinfo->nla_type & NLA_F_NESTED) {
1003                         err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX,
1004                                                           protinfo,
1005                                                           br_port_policy,
1006                                                           NULL);
1007                         if (err)
1008                                 return err;
1009
1010                         spin_lock_bh(&p->br->lock);
1011                         err = br_setport(p, tb, extack);
1012                         spin_unlock_bh(&p->br->lock);
1013                 } else {
1014                         /* Binary compatibility with old RSTP */
1015                         if (nla_len(protinfo) < sizeof(u8))
1016                                 return -EINVAL;
1017
1018                         spin_lock_bh(&p->br->lock);
1019                         err = br_set_port_state(p, nla_get_u8(protinfo));
1020                         spin_unlock_bh(&p->br->lock);
1021                 }
1022                 if (err)
1023                         goto out;
1024                 changed = true;
1025         }
1026
1027         if (afspec)
1028                 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
1029
1030         if (changed)
1031                 br_ifinfo_notify(RTM_NEWLINK, br, p);
1032 out:
1033         return err;
1034 }
1035
1036 /* Delete port information */
1037 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
1038 {
1039         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
1040         struct net_bridge_port *p;
1041         struct nlattr *afspec;
1042         bool changed = false;
1043         int err = 0;
1044
1045         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1046         if (!afspec)
1047                 return 0;
1048
1049         p = br_port_get_rtnl(dev);
1050         /* We want to accept dev as bridge itself as well */
1051         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
1052                 return -EINVAL;
1053
1054         err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
1055         if (changed)
1056                 /* Send RTM_NEWLINK because userspace
1057                  * expects RTM_NEWLINK for vlan dels
1058                  */
1059                 br_ifinfo_notify(RTM_NEWLINK, br, p);
1060
1061         return err;
1062 }
1063
1064 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
1065                        struct netlink_ext_ack *extack)
1066 {
1067         if (tb[IFLA_ADDRESS]) {
1068                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1069                         return -EINVAL;
1070                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1071                         return -EADDRNOTAVAIL;
1072         }
1073
1074         if (!data)
1075                 return 0;
1076
1077 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1078         if (data[IFLA_BR_VLAN_PROTOCOL] &&
1079             !eth_type_vlan(nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])))
1080                 return -EPROTONOSUPPORT;
1081
1082         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1083                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1084
1085                 if (defpvid >= VLAN_VID_MASK)
1086                         return -EINVAL;
1087         }
1088 #endif
1089
1090         return 0;
1091 }
1092
1093 static int br_port_slave_changelink(struct net_device *brdev,
1094                                     struct net_device *dev,
1095                                     struct nlattr *tb[],
1096                                     struct nlattr *data[],
1097                                     struct netlink_ext_ack *extack)
1098 {
1099         struct net_bridge *br = netdev_priv(brdev);
1100         int ret;
1101
1102         if (!data)
1103                 return 0;
1104
1105         spin_lock_bh(&br->lock);
1106         ret = br_setport(br_port_get_rtnl(dev), data, extack);
1107         spin_unlock_bh(&br->lock);
1108
1109         return ret;
1110 }
1111
1112 static int br_port_fill_slave_info(struct sk_buff *skb,
1113                                    const struct net_device *brdev,
1114                                    const struct net_device *dev)
1115 {
1116         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
1117 }
1118
1119 static size_t br_port_get_slave_size(const struct net_device *brdev,
1120                                      const struct net_device *dev)
1121 {
1122         return br_port_info_size();
1123 }
1124
1125 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1126         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1127         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
1128         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
1129         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1130         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1131         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1132         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1133         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1134         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1135         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1136                                  .len  = ETH_ALEN },
1137         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1138         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1139         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1140         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1141         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1142         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1143         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1144         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1145         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1146         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1147         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1148         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1149         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1150         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1151         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1152         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1153         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1154         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1155         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1156         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1157         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1158         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1159         [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1160         [IFLA_BR_MULTI_BOOLOPT] =
1161                 NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)),
1162 };
1163
1164 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1165                          struct nlattr *data[],
1166                          struct netlink_ext_ack *extack)
1167 {
1168         struct net_bridge *br = netdev_priv(brdev);
1169         int err;
1170
1171         if (!data)
1172                 return 0;
1173
1174         if (data[IFLA_BR_FORWARD_DELAY]) {
1175                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1176                 if (err)
1177                         return err;
1178         }
1179
1180         if (data[IFLA_BR_HELLO_TIME]) {
1181                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1182                 if (err)
1183                         return err;
1184         }
1185
1186         if (data[IFLA_BR_MAX_AGE]) {
1187                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1188                 if (err)
1189                         return err;
1190         }
1191
1192         if (data[IFLA_BR_AGEING_TIME]) {
1193                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1194                 if (err)
1195                         return err;
1196         }
1197
1198         if (data[IFLA_BR_STP_STATE]) {
1199                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1200
1201                 err = br_stp_set_enabled(br, stp_enabled, extack);
1202                 if (err)
1203                         return err;
1204         }
1205
1206         if (data[IFLA_BR_PRIORITY]) {
1207                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1208
1209                 br_stp_set_bridge_priority(br, priority);
1210         }
1211
1212         if (data[IFLA_BR_VLAN_FILTERING]) {
1213                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1214
1215                 err = br_vlan_filter_toggle(br, vlan_filter, extack);
1216                 if (err)
1217                         return err;
1218         }
1219
1220 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1221         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1222                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1223
1224                 err = __br_vlan_set_proto(br, vlan_proto, extack);
1225                 if (err)
1226                         return err;
1227         }
1228
1229         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1230                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1231
1232                 err = __br_vlan_set_default_pvid(br, defpvid, extack);
1233                 if (err)
1234                         return err;
1235         }
1236
1237         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1238                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1239
1240                 err = br_vlan_set_stats(br, vlan_stats);
1241                 if (err)
1242                         return err;
1243         }
1244
1245         if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1246                 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1247
1248                 err = br_vlan_set_stats_per_port(br, per_port);
1249                 if (err)
1250                         return err;
1251         }
1252 #endif
1253
1254         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1255                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1256
1257                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1258                         return -EINVAL;
1259                 br->group_fwd_mask = fwd_mask;
1260         }
1261
1262         if (data[IFLA_BR_GROUP_ADDR]) {
1263                 u8 new_addr[ETH_ALEN];
1264
1265                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1266                         return -EINVAL;
1267                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1268                 if (!is_link_local_ether_addr(new_addr))
1269                         return -EINVAL;
1270                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1271                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1272                     new_addr[5] == 3)           /* 802.1X PAE address */
1273                         return -EINVAL;
1274                 spin_lock_bh(&br->lock);
1275                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1276                 spin_unlock_bh(&br->lock);
1277                 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1278                 br_recalculate_fwd_mask(br);
1279         }
1280
1281         if (data[IFLA_BR_FDB_FLUSH])
1282                 br_fdb_flush(br);
1283
1284 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1285         if (data[IFLA_BR_MCAST_ROUTER]) {
1286                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1287
1288                 err = br_multicast_set_router(br, multicast_router);
1289                 if (err)
1290                         return err;
1291         }
1292
1293         if (data[IFLA_BR_MCAST_SNOOPING]) {
1294                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1295
1296                 br_multicast_toggle(br, mcast_snooping);
1297         }
1298
1299         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1300                 u8 val;
1301
1302                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1303                 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1304         }
1305
1306         if (data[IFLA_BR_MCAST_QUERIER]) {
1307                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1308
1309                 err = br_multicast_set_querier(br, mcast_querier);
1310                 if (err)
1311                         return err;
1312         }
1313
1314         if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1315                 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1316                         RHT_ELASTICITY);
1317
1318         if (data[IFLA_BR_MCAST_HASH_MAX])
1319                 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1320
1321         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1322                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1323
1324                 br->multicast_last_member_count = val;
1325         }
1326
1327         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1328                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1329
1330                 br->multicast_startup_query_count = val;
1331         }
1332
1333         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1334                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1335
1336                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1337         }
1338
1339         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1340                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1341
1342                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1343         }
1344
1345         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1346                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1347
1348                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1349         }
1350
1351         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1352                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1353
1354                 br->multicast_query_interval = clock_t_to_jiffies(val);
1355         }
1356
1357         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1358                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1359
1360                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1361         }
1362
1363         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1364                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1365
1366                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1367         }
1368
1369         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1370                 __u8 mcast_stats;
1371
1372                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1373                 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1374         }
1375
1376         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1377                 __u8 igmp_version;
1378
1379                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1380                 err = br_multicast_set_igmp_version(br, igmp_version);
1381                 if (err)
1382                         return err;
1383         }
1384
1385 #if IS_ENABLED(CONFIG_IPV6)
1386         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1387                 __u8 mld_version;
1388
1389                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1390                 err = br_multicast_set_mld_version(br, mld_version);
1391                 if (err)
1392                         return err;
1393         }
1394 #endif
1395 #endif
1396 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1397         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1398                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1399
1400                 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1401         }
1402
1403         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1404                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1405
1406                 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1407         }
1408
1409         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1410                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1411
1412                 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1413         }
1414 #endif
1415
1416         if (data[IFLA_BR_MULTI_BOOLOPT]) {
1417                 struct br_boolopt_multi *bm;
1418
1419                 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1420                 err = br_boolopt_multi_toggle(br, bm, extack);
1421                 if (err)
1422                         return err;
1423         }
1424
1425         return 0;
1426 }
1427
1428 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1429                           struct nlattr *tb[], struct nlattr *data[],
1430                           struct netlink_ext_ack *extack)
1431 {
1432         struct net_bridge *br = netdev_priv(dev);
1433         int err;
1434
1435         err = register_netdevice(dev);
1436         if (err)
1437                 return err;
1438
1439         if (tb[IFLA_ADDRESS]) {
1440                 spin_lock_bh(&br->lock);
1441                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1442                 spin_unlock_bh(&br->lock);
1443         }
1444
1445         err = br_changelink(dev, tb, data, extack);
1446         if (err)
1447                 br_dev_delete(dev, NULL);
1448
1449         return err;
1450 }
1451
1452 static size_t br_get_size(const struct net_device *brdev)
1453 {
1454         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1455                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1456                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1457                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1458                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1459                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1460                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1461 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1462                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1463                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1464                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1465                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_PER_PORT */
1466 #endif
1467                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1468                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1469                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1470                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1471                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1472                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1473                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1474                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1475                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1476                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1477                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1478                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1479 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1480                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1481                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1482                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1483                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1484                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1485                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1486                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1487                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1488                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1489                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1490                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1491                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1492                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1493                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1494                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1495                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1496                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1497 #endif
1498 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1499                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1500                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1501                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1502 #endif
1503                nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1504                0;
1505 }
1506
1507 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1508 {
1509         struct net_bridge *br = netdev_priv(brdev);
1510         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1511         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1512         u32 age_time = jiffies_to_clock_t(br->max_age);
1513         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1514         u32 stp_enabled = br->stp_enabled;
1515         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1516         u8 vlan_enabled = br_vlan_enabled(br->dev);
1517         struct br_boolopt_multi bm;
1518         u64 clockval;
1519
1520         clockval = br_timer_value(&br->hello_timer);
1521         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1522                 return -EMSGSIZE;
1523         clockval = br_timer_value(&br->tcn_timer);
1524         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1525                 return -EMSGSIZE;
1526         clockval = br_timer_value(&br->topology_change_timer);
1527         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1528                               IFLA_BR_PAD))
1529                 return -EMSGSIZE;
1530         clockval = br_timer_value(&br->gc_work.timer);
1531         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1532                 return -EMSGSIZE;
1533
1534         br_boolopt_multi_get(br, &bm);
1535         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1536             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1537             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1538             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1539             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1540             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1541             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1542             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1543             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1544                     &br->bridge_id) ||
1545             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1546                     &br->designated_root) ||
1547             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1548             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1549             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1550             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1551                        br->topology_change_detected) ||
1552             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1553             nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1554                 return -EMSGSIZE;
1555
1556 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1557         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1558             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1559             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1560                        br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1561             nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1562                        br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
1563                 return -EMSGSIZE;
1564 #endif
1565 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1566         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1567             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1568                        br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1569             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1570                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1571             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1572                        br_opt_get(br, BROPT_MULTICAST_QUERIER)) ||
1573             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1574                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1575             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1576             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1577             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1578                         br->multicast_last_member_count) ||
1579             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1580                         br->multicast_startup_query_count) ||
1581             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1582                        br->multicast_igmp_version))
1583                 return -EMSGSIZE;
1584 #if IS_ENABLED(CONFIG_IPV6)
1585         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1586                        br->multicast_mld_version))
1587                 return -EMSGSIZE;
1588 #endif
1589         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1590         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1591                               IFLA_BR_PAD))
1592                 return -EMSGSIZE;
1593         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1594         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1595                               IFLA_BR_PAD))
1596                 return -EMSGSIZE;
1597         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1598         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1599                               IFLA_BR_PAD))
1600                 return -EMSGSIZE;
1601         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1602         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1603                               IFLA_BR_PAD))
1604                 return -EMSGSIZE;
1605         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1606         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1607                               IFLA_BR_PAD))
1608                 return -EMSGSIZE;
1609         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1610         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1611                               IFLA_BR_PAD))
1612                 return -EMSGSIZE;
1613 #endif
1614 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1615         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1616                        br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1617             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1618                        br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1619             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1620                        br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1621                 return -EMSGSIZE;
1622 #endif
1623
1624         return 0;
1625 }
1626
1627 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1628 {
1629         struct net_bridge_port *p = NULL;
1630         struct net_bridge_vlan_group *vg;
1631         struct net_bridge_vlan *v;
1632         struct net_bridge *br;
1633         int numvls = 0;
1634
1635         switch (attr) {
1636         case IFLA_STATS_LINK_XSTATS:
1637                 br = netdev_priv(dev);
1638                 vg = br_vlan_group(br);
1639                 break;
1640         case IFLA_STATS_LINK_XSTATS_SLAVE:
1641                 p = br_port_get_rtnl(dev);
1642                 if (!p)
1643                         return 0;
1644                 br = p->br;
1645                 vg = nbp_vlan_group(p);
1646                 break;
1647         default:
1648                 return 0;
1649         }
1650
1651         if (vg) {
1652                 /* we need to count all, even placeholder entries */
1653                 list_for_each_entry(v, &vg->vlan_list, vlist)
1654                         numvls++;
1655         }
1656
1657         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1658                nla_total_size(sizeof(struct br_mcast_stats)) +
1659                nla_total_size(0);
1660 }
1661
1662 static int br_fill_linkxstats(struct sk_buff *skb,
1663                               const struct net_device *dev,
1664                               int *prividx, int attr)
1665 {
1666         struct nlattr *nla __maybe_unused;
1667         struct net_bridge_port *p = NULL;
1668         struct net_bridge_vlan_group *vg;
1669         struct net_bridge_vlan *v;
1670         struct net_bridge *br;
1671         struct nlattr *nest;
1672         int vl_idx = 0;
1673
1674         switch (attr) {
1675         case IFLA_STATS_LINK_XSTATS:
1676                 br = netdev_priv(dev);
1677                 vg = br_vlan_group(br);
1678                 break;
1679         case IFLA_STATS_LINK_XSTATS_SLAVE:
1680                 p = br_port_get_rtnl(dev);
1681                 if (!p)
1682                         return 0;
1683                 br = p->br;
1684                 vg = nbp_vlan_group(p);
1685                 break;
1686         default:
1687                 return -EINVAL;
1688         }
1689
1690         nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
1691         if (!nest)
1692                 return -EMSGSIZE;
1693
1694         if (vg) {
1695                 u16 pvid;
1696
1697                 pvid = br_get_pvid(vg);
1698                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1699                         struct bridge_vlan_xstats vxi;
1700                         struct pcpu_sw_netstats stats;
1701
1702                         if (++vl_idx < *prividx)
1703                                 continue;
1704                         memset(&vxi, 0, sizeof(vxi));
1705                         vxi.vid = v->vid;
1706                         vxi.flags = v->flags;
1707                         if (v->vid == pvid)
1708                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1709                         br_vlan_get_stats(v, &stats);
1710                         vxi.rx_bytes = stats.rx_bytes;
1711                         vxi.rx_packets = stats.rx_packets;
1712                         vxi.tx_bytes = stats.tx_bytes;
1713                         vxi.tx_packets = stats.tx_packets;
1714
1715                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1716                                 goto nla_put_failure;
1717                 }
1718         }
1719
1720 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1721         if (++vl_idx >= *prividx) {
1722                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1723                                         sizeof(struct br_mcast_stats),
1724                                         BRIDGE_XSTATS_PAD);
1725                 if (!nla)
1726                         goto nla_put_failure;
1727                 br_multicast_get_stats(br, p, nla_data(nla));
1728         }
1729 #endif
1730
1731         if (p) {
1732                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP,
1733                                         sizeof(p->stp_xstats),
1734                                         BRIDGE_XSTATS_PAD);
1735                 if (!nla)
1736                         goto nla_put_failure;
1737
1738                 spin_lock_bh(&br->lock);
1739                 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats));
1740                 spin_unlock_bh(&br->lock);
1741         }
1742
1743         nla_nest_end(skb, nest);
1744         *prividx = 0;
1745
1746         return 0;
1747
1748 nla_put_failure:
1749         nla_nest_end(skb, nest);
1750         *prividx = vl_idx;
1751
1752         return -EMSGSIZE;
1753 }
1754
1755 static struct rtnl_af_ops br_af_ops __read_mostly = {
1756         .family                 = AF_BRIDGE,
1757         .get_link_af_size       = br_get_link_af_size_filtered,
1758 };
1759
1760 struct rtnl_link_ops br_link_ops __read_mostly = {
1761         .kind                   = "bridge",
1762         .priv_size              = sizeof(struct net_bridge),
1763         .setup                  = br_dev_setup,
1764         .maxtype                = IFLA_BR_MAX,
1765         .policy                 = br_policy,
1766         .validate               = br_validate,
1767         .newlink                = br_dev_newlink,
1768         .changelink             = br_changelink,
1769         .dellink                = br_dev_delete,
1770         .get_size               = br_get_size,
1771         .fill_info              = br_fill_info,
1772         .fill_linkxstats        = br_fill_linkxstats,
1773         .get_linkxstats_size    = br_get_linkxstats_size,
1774
1775         .slave_maxtype          = IFLA_BRPORT_MAX,
1776         .slave_policy           = br_port_policy,
1777         .slave_changelink       = br_port_slave_changelink,
1778         .get_slave_size         = br_port_get_slave_size,
1779         .fill_slave_info        = br_port_fill_slave_info,
1780 };
1781
1782 int __init br_netlink_init(void)
1783 {
1784         int err;
1785
1786         br_mdb_init();
1787         br_vlan_rtnl_init();
1788         rtnl_af_register(&br_af_ops);
1789
1790         err = rtnl_link_register(&br_link_ops);
1791         if (err)
1792                 goto out_af;
1793
1794         return 0;
1795
1796 out_af:
1797         rtnl_af_unregister(&br_af_ops);
1798         br_mdb_uninit();
1799         return err;
1800 }
1801
1802 void br_netlink_fini(void)
1803 {
1804         br_mdb_uninit();
1805         br_vlan_rtnl_uninit();
1806         rtnl_af_unregister(&br_af_ops);
1807         rtnl_link_unregister(&br_link_ops);
1808 }